Calculate how much energy must be added to 50.0g of water to raise its temperature from 40.0 degrees Celsius to 45.0 degrees Celsius?

1 Answer
Junaid Mirza
May 25, 2018

#"1.05 kJ"#

Explanation:

Use this equation

#"Q = mC"Δ"T"#

where

  • #"Q ="# Heat
  • #"m ="# Mass of sample
  • #"C ="# Specific heat of sample (#"4.186 J/g°C"# for water)
  • #"ΔT ="# Change in temperature

#"Q" = 50 cancel"g" × "4.186 J"/(cancel"g" cancel"°C") × (45.0 - 40.0) cancel"°C" = "1046.5 J" ≈ "1.05 kJ"#

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